He hates ––– kept –––.

The sentence "He hates to be kept waiting" utilizes the infinitive form of the verb "to be" (in this case, "to be kept") followed by the present participle "waiting." This construction employs the gerund form ("waiting") after the verb "kept," indicating an ongoing action. The infinitive "to be" functions as the object of the verb "hates." In English grammar, infinitives are often used after certain verbs like "hates," "likes," or "wants" to express purpose or intention. Additionally, the phrase "to be kept waiting" acts as a noun phrase, serving as the direct object of the verb "hates."